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MCR03EZPFX1271 Equivalent & Substitute Parts
Part Overview
The MCR03EZPFX1271 is a 1.27 kOhms ±1% 0.1W thick film chip resistor in 0603 (1608 Metric) package manufactured by Rohm Semiconductor. This component is rated for automotive applications under AEC-Q200 standard with an operating temperature range of -55°C to 155°C. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 1.27 kOhms |
| Tolerance | ±1% |
| Power Rating | 0.1W (1/10W) |
| Package / Case | 0603 (1608 Metric) |
| Composition | Thick Film |
| Temperature Coefficient | ±100ppm/°C |
| Operating Temperature Range | -55°C ~ 155°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the MCR03EZPFX1271 is determined by strict equivalence across the following parameters:
- Resistance value: 1.27 kOhms
- Tolerance: ±1%
- Power rating: 0.1W (1/10W)
- Package: 0603 (1608 Metric)
- Composition: Thick Film
- Temperature coefficient: ±100ppm/°C
- Operating temperature range: -55°C ~ 155°C
- RoHS3 compliance
- MSL rating: 1 (Unlimited)
Substitute parts are classified into two categories:
Direct Equivalents maintain full automotive AEC-Q200 certification and identical electrical specifications.
Similar Alternatives meet all electrical and mechanical parameters but feature moisture-resistant construction instead of automotive AEC-Q200 rating. These are suitable for applications where automotive qualification is not mandatory.
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Package | Temp Coeff | Operating Temp | AEC-Q200 | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|
| MCR03EZPFX1271 | Rohm Semiconductor | 1.27 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Discontinued | 663 Pcs |
| CRCW06031K27FKEA | Vishay Dale | 1.27 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 55337 Pcs |
| ERJ-3EKF1271V | Panasonic Electronic Components | 1.27 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 38034 Pcs |
| RMCF0603FT1K27 | Stackpole Electronics Inc | 1.27 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | Yes | Active | 21259 Pcs |
| CR0603-FX-1271ELF | Bourns Inc. | 1.27 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 16469 Pcs |
| RC0603FR-071K27L | YAGEO | 1.27 kΩ | ±1% | 0.1 | 0603 | ±100ppm/°C | -55°C ~ 155°C | No | Active | 141075 Pcs |
Engineering Selection Recommendations
For applications requiring automotive AEC-Q200 certification, select from the direct equivalent group: CRCW06031K27FKEA (Vishay Dale), ERJ-3EKF1271V (Panasonic Electronic Components), or RMCF0603FT1K27 (Stackpole Electronics Inc). All three maintain identical electrical specifications and automotive qualification status.
CRCW06031K27FKEA offers the highest inventory availability (55337 Pcs) and active product status, making it the primary recommendation for high-volume procurement.
For applications where automotive AEC-Q200 certification is not required, CR0603-FX-1271ELF (Bourns Inc.) and RC0603FR-071K27L (YAGEO) are functionally equivalent alternatives. RC0603FR-071K27L provides superior inventory availability (141075 Pcs) and represents the most accessible option for non-automotive applications.
All substitute parts maintain ROHS3 compliance, MSL rating of 1 (Unlimited), and identical mechanical dimensions within specified tolerances.
Frequently Asked Questions (FAQ)
Q: Can I use CR0603-FX-1271ELF or RC0603FR-071K27L in place of MCR03EZPFX1271 in automotive applications?
A: CR0603-FX-1271ELF and RC0603FR-071K27L do not carry AEC-Q200 automotive certification. Use these only in applications where automotive qualification is not a requirement. For automotive applications, select CRCW06031K27FKEA, ERJ-3EKF1271V, or RMCF0603FT1K27.
Q: Are all substitute parts physically compatible with the original MCR03EZPFX1271?
A: Yes. All substitute parts use the 0603 (1608 Metric) package with identical termination count (2) and compatible physical dimensions. Mechanical fit on PCBs is equivalent.
Q: What is the difference between direct equivalents and similar alternatives?
A: Direct equivalents (CRCW06031K27FKEA, ERJ-3EKF1271V, RMCF0603FT1K27) maintain AEC-Q200 automotive certification. Similar alternatives (CR0603-FX-1271ELF, RC0603FR-071K27L) feature moisture-resistant construction but lack automotive qualification.
Q: Do all substitute parts meet the same electrical specifications?
A: Yes. All substitute parts match the original specification: 1.27 kOhms ±1% tolerance, 0.1W power rating, ±100ppm/°C temperature coefficient, and -55°C to 155°C operating range.
Q: Which substitute offers the best availability?
A: RC0603FR-071K27L (YAGEO) has the highest inventory (141075 Pcs). For automotive-qualified parts, CRCW06031K27FKEA (Vishay Dale) offers the best availability at 55337 Pcs.
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